, Volume 21, Issue 1, pp 113–121 | Cite as

Novel techniques in high speed modem implementation using programmable DSPs

  • G N S Kumar
  • K Harinath Reddy
Recent Results In Signal Processing And Communication


We present the design and performance of a high speed MSK modem that incorporates digital heterodyne processing. A novel table look-up procedure for direct IF/RF modulation, based on a suitable maximal-length shift register sequence, is described. High performance, linear phase, low-complexity mixing and filtering in the receiver is achieved using multirate IFIR filters, where the shaping filter may possibly beM-th-band. The configuration of the IFIR filters is chosen based on the carrier frequency and the filtering requirements.


Minimum shift keying direct IF/RF modulation multirate IFIR filters 


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Copyright information

© Indian Academy of Sciences 1996

Authors and Affiliations

  • G N S Kumar
    • 1
  • K Harinath Reddy
    • 1
  1. 1.Signion Systems Pvt. Ltd 6-3-569/1/, Rockdale Compound, SomajigudaHyderabadIndia

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